barrier(redirected from blood-brain barrier (BBB))
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1. A material formation or structure, such as a mountain range or wall, that prevents passage or access.
2. Something immaterial that obstructs or impedes: Lack of education can be a barrier to success.
3. Physiology A membrane, tissue, or mechanism that blocks the passage of certain substances.
4. Ecology A physical or biological factor that limits the migration, interbreeding, or free movement of individuals or populations.
5. A movable gate that keeps racehorses in line before the start of a race.
6. often barriers The palisades or fences enclosing the lists of a medieval tournament.
7. Geology An ice barrier.
[Middle English barrer, from Old French barriere, from Vulgar Latin *barrāria, from *barra, bar.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. anything serving to obstruct passage or to maintain separation, such as a fence or gate
2. anything that prevents or obstructs passage, access, or progress: a barrier of distrust.
3. anything that separates or hinders union: a language barrier.
4. (Physical Geography)
a. an exposed offshore sand bar separated from the shore by a lagoon
b. (as modifier): a barrier beach.
5. (Physical Geography) (sometimes capital) that part of the Antarctic icecap extending over the sea
[C14: from Old French barriere, from barre bar1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
bar•ri•er(ˈbær i ər)
1. anything built or serving to bar passage, as a railing, fence, or the like.
2. any natural bar or obstacle: a mountain barrier.
3. anything that obstructs progress, access, etc.: trade barriers.
4. a limit or boundary of any kind: the barriers of caste.
5. an antarctic ice shelf or its front.
6. barriers, the palisade or railing surrounding the ground where medieval tournaments and jousts were held.
[1275–1325; Middle English < Middle French barriere <barre bar1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A coordinated series of obstacles designed or employed to channel, direct, restrict, delay, or stop the movement of an opposing force and to impose additional losses in personnel, time, and equipment on the opposing force. Barriers can exist naturally, be manmade, or a combination of both.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
Switch to new thesaurus
|Noun||1.||barrier - a structure or object that impedes free movement|
balusters, balustrade, banister, handrail, bannister - a railing at the side of a staircase or balcony to prevent people from falling
barricade - a barrier (usually thrown up hastily) to impede the advance of an enemy; "they stormed the barricade"
breakwater, groyne, jetty, seawall, bulwark, groin, mole - a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
bulwark - a fencelike structure around a deck (usually plural)
crash barrier - a strong protective barrier that is erected around a racetrack or in the middle of a dual-lane highway in order to reduce the likelihood of severe accidents
dam - a barrier constructed to contain the flow of water or to keep out the sea
fender, wing - a barrier that surrounds the wheels of a vehicle to block splashing water or mud; "in Britain they call a fender a wing"
hurdle - a light movable barrier that competitors must leap over in certain races
movable barrier - a barrier that can be moved to allow passage
impedimenta, obstruction, obstructor, obstructer, impediment - any structure that makes progress difficult
revetment - a barrier against explosives
barricade, roadblock - a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
|2.||barrier - any condition that makes it difficult to make progress or to achieve an objective; "intolerance is a barrier to understanding"|
obstacle, obstruction - something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"
ideological barrier - a barrier to cooperation or interaction resulting from conflicting ideologies
language barrier - barrier to communication resulting from speaking different languages
|3.||barrier - anything serving to maintain separation by obstructing vision or access|
bar - a submerged (or partly submerged) ridge in a river or along a shore; "the boat ran aground on a submerged bar in the river"
blood-brain barrier - a mechanism that creates a barrier between brain tissues and circulating blood; serves to protect the central nervous system; "the brain was protected from the large molecules of the virus by the blood-brain barrier"
curtain - any barrier to communication or vision; "a curtain of secrecy"; "a curtain of trees"
mechanism - a natural object resembling a machine in structure or function; "the mechanism of the ear"; "the mechanism of infection"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
1. obstacle, bar, block, handicap, hurdle, limitation, hitch, drawback, snag, obstruction, stumbling block, impediment, hindrance Duties and taxes are the most obvious barriers to free trade.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
hindrun, fyrirstaîahindrun, tálmi
A. N → barrera f, valla f (Rail) (in station) → barrera f; (= crash barrier) → valla f protectora (fig) → barrera f, obstáculo m (to para)
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
(= wall) → barrière f
(= obstacle) a barrier to sth [+ progress, communication] → un obstacle à qch language barrier, trade barriers
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
(natural) → Barriere f; (man-made, erected also) → Sperre f; (= railing etc) → Schranke f; (= crash barrier) → (Leit)planke f
(fig: = obstacle) → Hindernis nt, → Barriere f → (to für); (of class, background, education, between people) → Schranke f, → Barriere f; trade barriers → Handelsschranken pl; barrier of language, language barrier → Sprachbarriere f; a barrier to success/progress etc → ein Hindernis für den Erfolg/Fortschritt etc; because of the barrier of her shyness → aufgrund or auf Grund ihrer Schüchternheit, die ein Hemmnis ist/war etc; to put up/break down barriers → Zäune errichten/niederreißen
n → Barriere-, Wallriff nt; the Great Barrier Reef → das Große Barriereriff
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
barrier[ˈbærɪəʳ] n → barriera (Brit) (also crash barrier) → guardrail m inv (Rail) (in station) → cancello (fig) → barriera, ostacolo
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
1. something put up as a defence or protection. a barrier between the playground and the busy road. slagboom, versperring حاجِز преграда barreira zábrana, bariéra, závora die Barriere barrikade; afspærring φράγμαbarrera tõke مانع muuri barrièreחיץ, מחסום अवरोध barijera korlát penyekat, rintangan hindrun, tálmi barriera 障壁 방책 barjeras, užtvara barjera; nožogojums penghalang slagboombarriere, sperrebariera, zapora خنډ، سد barreira barieră ограждение bariéra, závora pregrada barijera barriär สิ่งกีดขวาง bariyer, engel 護欄 бар'єр; шлагбаум ناکہ ، رکاوٹ hàng rào 栅栏
2. something that causes difficulty. His deafness was a barrier to promotion. hindernis عائِق препятствие barreira překážka das Hindernis hindring εμπόδιο, τροχοπέδηbarrera, obstáculo takistus مانع este obstacleמכשול रुकावट zapreka akadály penghambat hindrun, fyrirstaða ostacolo 障害 장애 kliūtis šķērslis; kavēklis menghalang hindernishindring, barriereprzeszkoda ستونځي barreira piedică помеха prekážka ovira barijera hinder อุปสรรค engel, sorun 障礙 перешкода, завада روک trở ngại 障碍
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
barrier→ حَاجِز bariéra barriere Schranke εμπόδιο barrera este barrière prepreka barriera 柵 장벽 barrière barriere bariera barreira препятствие barriär สิ่งกีดขวาง bariyer chướng ngại 障碍
Multilingual Translator © HarperCollins Publishers 2009
n. obstrucción, barrera.
English-Spanish Medical Dictionary © Farlex 2012
barriern barrera; placental — barrera placentaria
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.